json

{
  "usingComponents": {
    "verificationCode": "../../../component/verificationCode/verificationCode"
  }
}

wxml

<view>
  <button catchtap="showDialog">朴素按钮</button>
  <view class="verificationCodeComp">
    <verificationCode id='sssss'></verificationCode>
  </view>
</view>

js

onReady: function () {
    console.log('this.selectComponent("#sssss"); ',this.selectComponent("#sssss"))
  },
  showDialog: function() {
    console.log('this.selectComponent("#sssss"); ',this.selectComponent("#sssss"))
    this.setData({
      isShow: !this.data.isShow,
    })
  },